Camparative Study of TCSC and UPFC Implemented For Congestion Management in Deregulated Power System

One of the technical challenges in Power system deregulation is Congestion. In deregulated electricity market congestion in transmission line occurs when there is inadequate amount of transmission capability to simultaneously accommodate all constraints for transmission of a line. Flexible Alternative Current Transmission System (FACTS) devices is a solution to reduce the flows in over loaded lines, resulting in an increased loadability, controlling the power flow in the network, improved stability of the network ,low system loss, and there by reduced cost of production. This paper deals with effect of different types of FACTS devices such as thyristor controlled series capacitor (TCSC) and Unified Power Flow Controller which are deal with particular 300km,3 Phase,400 V, (L-L), 50 Hz. long transmission line prototype system for improvement of the power flow at receiving end and also the voltage at the receiving will be effected by different types of nonlinearity present in power transmission which improved by FACTS devices. From result we will compare different FACTS devices by which we can conclude that UPFC will have maximum capability for power flow improvement. All simulations have been carried out in MATLAB/SIMULINK environment.